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https://issues.apache.org/jira/browse/MAPREDUCE-890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12804375#action_12804375
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Ravi Gummadi commented on MAPREDUCE-890:
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Another solution is to call DefaultTaskController's methods from
LinuxTaskContrller's methods if user(i.e. jobOwner) is tt_user. This will keep
700 permissions for userDir, jobcache, distcache dirs and so are secure and are
accessible to jobOwner.
As I don't see any issues with either of these 2 solutions, currently I am
planning to implement 1st approach(i.e. LinuxTaskController setting 770
permissions for jobcache and distcache dirs if jobOwner is tt_user).
Thoughts ?
> After HADOOP-4491, the user who started mapred system is not able to run job.
> -----------------------------------------------------------------------------
>
> Key: MAPREDUCE-890
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-890
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: tasktracker
> Reporter: Karam Singh
> Assignee: Ravi Gummadi
> Priority: Blocker
> Fix For: 0.21.0
>
> Attachments: MAPREDUCE-890-20090904.txt, MAPREDUCE-890-20090909.txt
>
>
> Even setup and cleanup task of job fails due exception -: It fails to create
> job and related directories under mapred.local.dir/taskTracker/jobcache
> Directories are created as -:
> [dr-xrws--- mapred hadoop ] job_200908190916_0002
> mapred is not wrtie under this. Even manually I failed to touch file.
> mapred is use of started mr cluster
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